<template>
  <el-menu
    default-active="1-4-1"
    class="el-menu-vertical-demo"
    background-color="#5c5c64"
    text-color="#fff"
    active-text-color="#ffd04b"
    @open="handleOpen"
    @close="handleClose"
    :collapse="isCollapse"
  >
    <h3>{{isCollapse ?'后台':'管理后台管理系统'}}</h3>
    <el-menu-item @click="clickMenu(item)" v-for="item in noChildren" :index="item.path" :key="item.path">
      <i :class="'el-icon-' + item.icon"></i>
      <span slot="title">{{ item.label }}</span>
    </el-menu-item>
    <el-submenu v-for="item in hasChildren" :index="item.path" :key="item.path">
      <template slot="title">
        <i :class="'el-icon-' + item.icon"></i>
        <span slot="title">{{ item.label }}</span>
      </template>
      <el-menu-item-group v-for="(subItem,subIndex) in item.children" :key="subItem.path">
        <el-menu-item @click="clickMenu(subItem)" :index="subIndex">{{ subItem.label }}</el-menu-item>
      </el-menu-item-group>
    </el-submenu>
  </el-menu>
</template>
<style lang="less" scoped>
.el-menu-vertical-demo:not(.el-menu--collapse) {
  width: 200px;
  min-height: 400px;
}
.el-menu {
  height: 100%;
  border: none;
  h3 {
    color: #fff;
    text-align: center;
    line-height: 48px;
  }
}
</style>

<script>
export default {
  data() {
    return {
      menu: [
        {
          path: "/",
          name: "home",
          label: "首页",
          icon: "s-home",
          url: "Home/Home"
        },
        {
          path: " /mall",
          name: "mall",
          label: "商品管理",
          icon: "video-play",
          url: "MallManage/MallManage"
        },
        {
          path: " /user",
          name: "user",
          label: "用户管理",
          icon: "user",
          url: "UserManage/UserManage"
        },
        {
          label: "其他",
          icon: "location",
          children: [
            {
              path: " /page1",
              name: "page1",
              label: "个人中心",
              icon: "setting",
              url: "Other/Page1"
            },
            {
              path: " /page2",
              name: "page2",
              label: "页面2",
              icon: "setting",
              url: "Other/Page2"
            }
          ]
        }
      ]
    };
  },
  computed: {
    noChildren() {
      return this.menu.filter(item => !item.children);
    },
    hasChildren() {
      return this.menu.filter(item => item.children);
    },
    isCollapse() {
      return this.$store.state.tab.isCollapse;
    }
  },
  methods: {
    handleOpen(key, keyPath) {
      console.log(key, keyPath);
    },
    handleClose(key, keyPath) {
      console.log(key, keyPath);
    },
    clickMenu(item) {
      this.$router.push({
        name: item.name
      })
      this.$store.commit('selectMenu',item)
    },
  }
};
</script>